Ring-shield for glass-drawing apparatus.



Patented J My 3, 1917.

W. L. MONRO'. RING SHI ELD FOR, GLASS DRAWING APPARATUS. APPLICATION FILED 8.18.1916. RENEWED NOV. 24. 1916.

WITNESSES UNITED STATES PATENT OFFICE.

WILLIAM L. MONRO', OF PITTSBURGH. PENNSYLVANIA. ASSIGNOR TO WINDOW GLASS MACHINE COMPANY, OF JERSEY.

PITTSBURGH. PENNSYLVANIA.

A CORPORATION OF NEW RING-SHIELD FOR GLASS-DRAWING AYZPABATUS.

To alt whomiil; may concern:

Be it known that l. \vmmawli. Moxno, a citizen of the l nited States, residing at littshurgh, Allegheny eounty, Pennsylvania, have invented a new and' useful Ring-\hield t'or Glass-Drawing Apparatus, of which the following is a full, clear, and exaet description, reference being had to the accompanying drawings, forming part of this specifieation, in whieh- Figured isa partial vertical section of a glass turn-ace provided with my improved ring shield, and

Fig. 2 is a front elevation of the ring shield on a larger seale.

My intention relatesto refractory rings used for drawing glass from a bath which is a part of or,extensi on of the glass bath in a tank furnace. In drawing glass from such a bath, it is diilieult to obtain glass of the'same temperature throughout the porticmwithin the drawing ring, owing to the glassIheing'ot' diflerent temperatures within the portion of the'bath containing the ring, The, temperature of the glass will he hotter'near the upper portions of the hath and (:oolerin the deeper portions, and the outer portion near the outer wall will he, as a whole, cooler than theinner portions nearer the main hodyof glass.

To overeome being of ditl'erent temperatures within the ring, Iemploy a ring'whose int-losing wall is deeper at some. portions than at other portions. nAs the deeper portions will take lass from the deeper portions of the bath, can, by turnin the ring to the right posi tion, substantial y equalize the temperature of the glass within the ring.

In the drawings 2 represents a portion of a tank furnace. having a drawing opening formed in an extension 3 thereof. sents the topstone tot this extension. and 5 a vertically nu 'able shield to out oil? the heat of the lurnaee. is the drawin ring, whieh may either he made to llltttl'Tlii with the under edge ol" the drawing opening 4 through-the 'topstone, or may simply eontaet with the bottom of the topstone. as desired. This ring is preferably a floating ring, and certain portionsoidm wall are made. deeper than otherportions. its lower edge. prel'erahl'y .heing' ein'ved .or int-lined downwardly l'roin one side to the other. as shown.

Specification of Letters Iatent.

' apparent to those at' t to take glass the dillieult'y oi the glass' position hetween Patented July 3, 1917.

0. Renewed November 24. 1916. Serial No. 133.266.

In the use of the ring, it is adjusted to the proper position so that the deepest edge of the ring will lie in the generally hotter portion of the hath. Consequently, the glass entering this deeper portion of the ring will he drawn from deeper portions of the glass hath, and thus have more-nearly the temperature of the upper nation of the cooler part of the glass bath in the form shown, where the furnace extension is used. the deeper portion of the ring will therefore be located nearest the main body of glass in the furnace, since in this form the outer portion of the body of glass containing the ring will be cooler on account of radiation, etc. The ring is always held by the top-stone in an upright position, thereby maintaining thereina symmetrical body of. glass around the drawing oint.

The advantages of 'my invention will be skilled in the art, since the (littering depths of the ring wall will from different depths and thus equalize the tem )erature of the glass from \\'lll('ll the eylin er'or other article is drawn. I

The ring may be made of any-desired shape other than eireular, and other changes may he made. without departing from my invention.

The ring may he tloated in and out of the drawing operations, or may remain in position and the glass be melted hark within the -ring between the drawing operations. The ring may also he seeured to the topst-one it desired. and may he turned around to difi'erent positions, the same asthough it were floatingin the bath.

1 t'ltlllll:

st. ln glass drawing apparatus, ,a ring arranged to surround the i-lrawing point and dip in a glass hath. the lower edge of the immersed portion of the ring having portions atditl'eren't levels e-nt-rfinee of glass from dill'erent levels litlow the surfare ot'the hath, together with means for holding said ring or a position to provide a s 'nnnetru-.al hody ol glass around the drawing point, suhshintially as to provide for i portion of the glass bath, together with means for holding said ring in a position to provide a symmetrical body of around the drawing point, substantially as described.

3.111 glass drawing apparatns, a refractory ring adapied to surround the drawing point and having a portion immersed in the glass bath, the immersed portion extending to different depths, the deeper portion being arranged within the hotter portion of the glass bath, together with means for holding said ring in a position to provide a symmvtriezil body of glass around the drawing point, snlmtzuitially as described.

In testimony whereof, I have hereunto setmy hand.

WILLIAM L. -MONR().

Witnesses:

Amen A. TIuLL, GEO. H. PARMELEE. j 

